Re: dan book?
My original dojo was unaffiliated. Having trained with the new folks for a little while, now, I can say that it's going to be a looong time before I'm qualified to test under the aikikai paradigm; there are a lot of basic differences in philosophy and technique. I'm like some funky mix of gokyu and shodan.
It's not quite like starting a completely new art, but it's not far off.